FSL 3 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.464498 n_e = 1.466179	V_d = 65.93 V_e = 65.74	n_F - n_C = 0.007044 n_F' - n_C' = 0.007091	Coloring: 0.30 - 0.34 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 2.1205655 C2 = -0.0089437249 C3 = 0.0090242393 C4 = 0.00013786285 C5 = -0.00000082750398 C6 = 0.000000026740448

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.456117
n _s	1.458341
n _r	1.461070
n _C	1.462326
n _C'	1.462675
n _0.6328	1.462999
n _D	1.464435
n _d	1.464498
n _e	1.466179
n _F	1.469371
n _F'	1.469766
n _g	1.473124
n _h	1.476212
n _i	1.481420
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8815
P_C,A'	0.3608
P_d,C	0.3082
P_e,C	0.5469
P_g,d	1.2244
P_g,F	0.5327
P_h,g	0.4383
P_i,g	1.1776
P_C',t	0.9309
P_e,C'	0.4975
P_F',e	0.5091
P_i,F'	1.6543

transmittance: 10 mm
τ_0.36	0.937
τ_0.37	0.966
τ_0.38	0.975
τ_0.39	0.986
τ_0.4	0.99
τ_0.42	0.993
τ_0.44	0.993
τ_0.46	0.995
τ_0.48	0.996
τ_0.5	0.997
τ_0.55	0.998
τ_0.6	0.997
τ_0.65	0.997
τ_0.7	0.998
τ_2.3254	0.85
τ_1.9701	0.94
τ_1.5296	0.992
τ_1.06	0.994
τ_0.66	0.994
τ_0.62	0.994
τ_0.58	0.994
τ_0.54607	0.994
τ_0.4358	0.993
τ_0.4047	0.99
τ_0.365	0.95
τ_0.35	0.91
τ_0.3341	0.66

transmittance: 25 mm
τ_2.3254	0.66
τ_1.9701	0.85
τ_1.5296	0.98
τ_1.06	0.985
τ_0.7	0.986
τ_0.66	0.986
τ_0.62	0.986
τ_0.58	0.986
τ_0.54607	0.986
τ_0.5	0.986
τ_0.46	0.984
τ_0.4358	0.982
τ_0.42	0.979
τ_0.4047	0.976
τ_0.4	0.973
τ_0.39	0.96
τ_0.38	0.95
τ_0.37	0.92
τ_0.365	0.88
τ_0.35	0.79
τ_0.3341	0.35

Poisson coef.: 0.24
Rigidity: 174 Pa*10⁸
Young module: 432 Pa*10⁸
Knoop hardness: 340
Abrasion: 131

Climatic resistance: 3
Resistance to acids: 52
Phosphate resistance: 2

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	79
100 ~ 300	93
20 ~ 300	91

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		0.2
20 ~ 40		1.5
60 ~ 80		2.1
-40 ~ -20	e	1.4
20 ~ 40	e	2.9
60 ~ 80	e	3.6
-40 ~ -20	g	3.1
20 ~ 40	g	4.7
60 ~ 80	g	5.5

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20	C'	-1.1
-20 ~ 0	C'	-0.9
0 ~ 20	C'	-0.7
20 ~ 40	C'	-0.5
40 ~ 60	C'	-0.4
60 ~ 80	C'	-0.3
-40 ~ -20	D	-1
-20 ~ 0	D	-0.8
0 ~ 20	D	-0.6
20 ~ 40	D	-0.4
40 ~ 60	D	-0.3
60 ~ 80	D	-0.2
-40 ~ -20	e	-0.9
-20 ~ 0	e	-0.7
0 ~ 20	e	-0.5
20 ~ 40	e	-0.3
40 ~ 60	e	-0.2
60 ~ 80	e	-0.1
-40 ~ -20	F	-0.8
-20 ~ 0	F	-0.5
0 ~ 20	F	-0.3
20 ~ 40	F	-0.1
60 ~ 80	F	0.1
-40 ~ -20	g	-0.7
-20 ~ 0	g	-0.4
0 ~ 20	g	-0.2
40 ~ 60	g	0.1
60 ~ 80	g	0.2
-40 ~ -20		2.3
20 ~ 40		2.9
60 ~ 80		3.2
20 ~ 40	g	6.1